diff -Nru pulseaudio-15.0+dfsg1/debian/changelog pulseaudio-15.0+dfsg1/debian/changelog
--- pulseaudio-15.0+dfsg1/debian/changelog	2021-10-22 10:28:32.000000000 +0000
+++ pulseaudio-15.0+dfsg1/debian/changelog	2021-11-20 04:15:12.000000000 +0000
@@ -1,3 +1,11 @@
+pulseaudio (1:15.0+dfsg1-1ubuntu2.2) impish; urgency=medium
+
+  * d/p/0001-card-restore-setting-preferred-ports-in-entry_from_c.patch
+    - cherry pick an upstream commit to fix the issue of hdmi can't be
+      restored after s3 resume (LP: #1951667)
+
+ -- Hui Wang <hui.wang@canonical.com>  Sat, 20 Nov 2021 12:15:12 +0800
+
 pulseaudio (1:15.0+dfsg1-1ubuntu2.1) impish; urgency=medium
 
   * debian/patches/gitlab_ice_error.patch:
diff -Nru pulseaudio-15.0+dfsg1/debian/patches/0001-card-restore-setting-preferred-ports-in-entry_from_c.patch pulseaudio-15.0+dfsg1/debian/patches/0001-card-restore-setting-preferred-ports-in-entry_from_c.patch
--- pulseaudio-15.0+dfsg1/debian/patches/0001-card-restore-setting-preferred-ports-in-entry_from_c.patch	1970-01-01 00:00:00.000000000 +0000
+++ pulseaudio-15.0+dfsg1/debian/patches/0001-card-restore-setting-preferred-ports-in-entry_from_c.patch	2021-11-20 04:15:12.000000000 +0000
@@ -0,0 +1,46 @@
+From 484b69863f0740cabf1a4e37eae92ffa8d18ee32 Mon Sep 17 00:00:00 2001
+From: Hui Wang <hui.wang@canonical.com>
+Date: Thu, 11 Nov 2021 19:05:20 +0800
+Subject: [PATCH] card-restore: setting preferred ports in entry_from_card
+
+If the preferred ports are not set in this function, the
+entrys_equal() always returns false in the card_put_hook_callback().
+This will make the entry be written into the metadata and the
+preferred ports will be cleaned by a mistake.
+
+And we met a hdmi audio bug which has sth to do with this issue, on
+the machines with the legacy HDA audio driver, the hdmi port has lower
+priority than speaker, users need to manually select the hdmi to be
+active output port, then the preferred output port is hdmi for this
+sound card, after reboot, the card_put_hook_callback() in the
+module-card-restore.c will be called and the preferred ports are
+cleaned by a mistake, then the hdmi output port or hdmi sink couldn't
+switch to be active after reboot or resume automatically. That is
+because the preferred ports are cleaned and hdmi port has lower
+priority than speaker, the profile_good_for_output() in the
+module-switch-on-port-available.c always returns false.
+
+Signed-off-by: Hui Wang <hui.wang@canonical.com>
+---
+ src/modules/module-card-restore.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/src/modules/module-card-restore.c b/src/modules/module-card-restore.c
+index 08f8333e4..c93d584ef 100644
+--- a/src/modules/module-card-restore.c
++++ b/src/modules/module-card-restore.c
+@@ -158,6 +158,11 @@ static struct entry *entry_from_card(pa_card *card) {
+     if (card->save_profile || entry->profile_is_sticky)
+         entry->profile = pa_xstrdup(card->active_profile->name);
+ 
++    if (card->preferred_input_port)
++        entry->preferred_input_port = pa_xstrdup(card->preferred_input_port->name);
++    if (card->preferred_output_port)
++        entry->preferred_output_port = pa_xstrdup(card->preferred_output_port->name);
++
+     PA_HASHMAP_FOREACH(port, card->ports, state) {
+         p_info = port_info_new(port);
+         pa_assert_se(pa_hashmap_put(entry->ports, p_info->name, p_info) >= 0);
+-- 
+2.25.1
+
diff -Nru pulseaudio-15.0+dfsg1/debian/patches/series pulseaudio-15.0+dfsg1/debian/patches/series
--- pulseaudio-15.0+dfsg1/debian/patches/series	2021-10-22 10:28:32.000000000 +0000
+++ pulseaudio-15.0+dfsg1/debian/patches/series	2021-11-20 04:15:12.000000000 +0000
@@ -17,3 +17,4 @@
 0701-enable-snap-policy-module.patch
 0702-add-snappy-policy-module.patch
 0016-check_off_profile_when_switching_profile.patch
+0001-card-restore-setting-preferred-ports-in-entry_from_c.patch